Electric push-switch.



1%. 733.911. v PATENTED FEB. 28, 1905. & BJIHOMAS.

ELEUTRIG PUSH SWITCH. "APPLICATION FILED mm: 13, 1904.

INVENTOR ATTORNEYS Patented February 28, 1905.

UNIT D STATES PATENT OFFICE.

GEORGE B. THOMAS, OF BRIDGEFORT, CONNECTICUT, ASSMNOR TO THE PERKINSELECTIRIC SWITCH I'IAXUFACTURING- COMPANY, OF BRIDGE- PORT, CONNECTICUT,A CORPORATION OF (.ONNEC'IIQU'I.

SPECIFICATION forming part of Letters Patent N 0. 783,911, datedFebruary 28, 1905.

Application filed June 13, 1904:. Serial No. 212,340.

To 'll ll wit/mt 7'1 TIMI/y concern:

Be it known that I, (i nose is B. THOMAS, a citizen of the UnitedStates, residing in Bridge- I r l l l port, in the county of Fair-field,in the State of 5 Connecticut, have invented Improvements in ing is aspecification.

My invention relates to improvements in the j con-structimi of thatclass of electric double push-switches in which the rocking switch- 1arm carrying the contact-lingers is adapted to be thrown by an insertedkey instead of by protruding buttons; and the object of my invention isto so construct such a so-called lock-switch that it can always be seenfrom the fee of the switch itself'whether the current is on or ofl' andinto which of the two keyholes the operating-key must be inserted tothrow the switch.

Inthe accompanying drawings, Figure 1 is a view of the faceplate of theswitch. Fig. 2 is a side elevation, partly in section, of the operativeparts of the switch. Fig. 3 is a reverse side view of the same. Fig.4 isasectional View on the line 4 4:, Fig. 2; and Fig. 5 is a cross-sectionon the line 5 5, Fig. 4.

In push-switches to be operated by keys as usually constructed the twokeyholes through which the operating-keys are to be inserted to throwthe switch by pressing directly or indirectly upon one end or the otherof the switchlever are formed in the face-plate itself or in fixedescutcheons in the face-plate. In either case it is impossible to tellfrom the face of the switch whether the current is on or off and intowhich of the two holes the-mmrating-key must be inserted to throw theswitch from its existing position. To meet this diiiiculty, Iv combinewith the moving part of the switch two followers, which work throughopenings in the front plate to serve as indicators, but

- which are so connected to the moving parts of the switch that theycannot be used to operate them. In carrying out my invention I prefer tomake these followers out of the escutcheons E and E for the keys, theseescutcheons being in the present instance mountedto slide to a limitedextent in and out in sleeves C C, tixed to the cross-plate B, whichcarries the frame B, for'the switch-lever D. 3

, a 11', guidedin the tubular cscutchconsl) E, Electric Push-Switches,of which the followi which are slotted along one side, shown at r, Figs.2, I, and ,5, to permit the oscntchcons to slide to a limited extentupon the heads (1' (Z or to permit the latter to slide within theescutcheons. and-slot or lost-motion connection between the escutcheonsand the moving parts of the Q switch. Normally springs N. carried by thepin .v' on thcframc B, tend to push these escutcheons inward, Figs. 2and 3, their inward movement being, however, limited by their cominginto contact with stops 1/ on the 5 frame B, as illustrated at the lowerportion of Fig. 2 and upper part of Fig. 3. Either escutcheon ispushedoutwardly by the end of the rod (looming against the end of theslot 0 in the corresponding escutcheon, shown 7 in the upper part ofFig. Thus when the switch-lever I) has been thrown to the closedposition, Fig. 2, the face of the escutchoon I) will be held about flushwith the face of its, sleeve C or the face-plate. and at the same timethe escutcheon E will be pressed back within its sleeve C and againstthe slop ll by the spring x. I prefer to make the face of the escutcheonI) 01'' a light color or shade,

while the faceot'the otheroscutcheon, I i, isot' 30 a dark color or shad0, so that when the escntcheon E is out and the escutrlu-on F. is in, as

shown, itmay be seen at. once from the face oi' the switch itself thatthe current is on and that if it is desired to turn oti' the current the5 key must'hc inserted through the projecting escutcheon E to press onthe head ll of the corresponding rod (Z to throw the switch to the otherposition. If any one should push on the projected escutcheon with apencil end, 9

use the expression in a suificiently'general sense to apply either to aconstruction in There is thus provided a pinholes for the insertion of akey to actuate the which the holes are formed in the metal of theface-plate itself 01 to a construction such as that specifically shown,in which the heads of the escutcheons form. in effect, a part of the-faceplate.

I claim as my invention-- 1. A double push-switch, having a switch- 1ing connected to the switch-lever to indicate lever and a face-elateprovided with two key l the position of the latter.

4.-A double push-switch having a switchlever and a faee plate with twoslidingescutcheons for the insertion of a key to actuate the lever witha lost motion for the pnrpose'set forth. i

5. A double push-switch having a switchlever and a face-plate with twosliding escutcheons for the insertion of a key to actuate the i lever,stops to limit the inward'movements of the escutcheons, springs tendingto push them inward and a pin-and-slot connection between theescu-tcheons and moving parts of'the j switch. 5

lever and indicating means to indicate into which keyhole the hey is tohe inserted to op mate the switch.

'2. A douhle pushswitch having a switchievei' and a face-plate providedwith two keyholes for the insertion of a hey to actuate the lever andtwo indicating-followers connected with lostmotion to the switch-leverto inclicate the position of the latter but not capable of opeiating it.s scribing witnesses.

3, A double push-switch having a switchl GEORGE B. THOMAS. lever endsface-plate with two sliding escutcl i l l l to this specification in thepresence oftwo sub- Witnesses:

(Jr. W. GooDRInen, J. H. BARKER.

eons carrying heyholes for the insertion of a key to actuate the lever,the escutcheons belevei, the escutcheons' being connected to the y Intestimony whereof I have signed my name

